Adhesive applying apparatus



March 22, 1960 5. F. c. BURKE 2,929,353

ADHESIVE APPLYING APPARATUS Filed Nov. 19, 1957 4 Sheets-Sheet l in vanfor George F C. Burke By his Attorney March 22, 1960 G. F. c. BURKE2,929,353

ADHESIVE APPLYING APPARATUS Filed Nov. 19, 1957 4 Sheets-Sheet 2 mam a Il I I I l March 22, 1960 e. F. c. BURKE 2,929,353 ADHESIVE APPLYINGAPPARATUS Filed Nov. 19, 1957 4 $heets-$heet s March 22, 1960 G. F. c.BURKE ADHESIVE APPLYING APPARATUS 4 Sheets-Sheet 4 Filed Nov. 19, 1957 lADHESIVE APPLYING APPARATUS Application November 19, 1957, SerialNo.697g395 4 Claims. (Cl. 118 600) This invention relates to novelapparatus for applying adhesive to one of the marginal portions of atraveling web and is herein illustrated as applied to amachine ofwell-known type forforming a web of paper-orthelihe into a tube forsubsequent use in the manufacture-of bags. It is to be understood,however, that the novel apparatus of this invention is not necessarilylimited to use in a machine of this particular type or to the exactmechanical construction shown. I

In machines of the type herein illustrated the web of .paper, as it isdrawn through the machine by feeding andspressing rolls, is folded overupon itself :toforma tube, and just before the folded-over Web entersthe-pressing and feeding rolls a band of adhesive is applied along"themarginal edge of the lowermost run by adhesive apparatus mounted onthe machine and including a nozzie adapted 'to engage the lowermost runof the web. Int he operation of machines of this type it frequentlybecomes necessary for the operator to rethread the leading edge of thefolded-over web into the'feeding arid pressing rolls at the beginning ofthe tube forming operation or during such operation in which the web hasbeen accidentally broken. When this occurs, the adhesive-applyingapparatus, and particularly its nozzle, is very much in the way of theoperator. During the rethreading o'peration the pressing and feedingrolls are, of course, first stopped so that the leading edge of the webmay be introduced thereinto, and after this has been done the operatorwill want to jog the machine a few times by starting and stopping thepressing and feeding rolls in order to see if the web has beenproperlythreaded and the machine otherwise ready to be put again into operation.If, as is frequently thecase, the adhesive applying device is drivenfromthe drive shaft of the machine, adhesive will be extruded through thenozzle during the ljogging of the machine and before the Web has beenproperly and completely rethreaded. I'hisfurtherham- :pers theo'peratorin rethreading the web and/or in making'any other adjustments in themachine before the tube V forming operation is again initiated.

The principal object of this invention is to provide a novel andimproved adhesive applyingapparatus for use in a machine of the typehere in question whereby the above difficulties are completely overcome.To this end, and in accordance with features of the invention, theherein illustrated apparatus, which comprises a device for dispensingadhesive, including a nozzleand means for extruding adhesive through thenozzle, is supported on a ---member extending transverselyof the tubeforming machine and over a traveling web therein, and this member --ispivoted at one end for movement in a direction to displace the adhesivedispensing device from an operative position to an inoperative positionand is releasably secured at its other end against 'snchpi'votalmovement. More particularly, a counterweight is'arranged' to effect thementioned'pivotal m'ovem'entbfthe adhesive device supportingmember upontherelea'seof'a manually oper. "able latch, and meansare provided'forautoinatically "dis- $29,353 Patented Mar. 22, 1960 .2eng'aging-aclutchopei'ativelyconnecting theadhestveyextrujdmg'means tothe power operated means of the ma- 6111116, inresponse to pivotalmovement of the supporting r'nerriber-to displace the adhesivedispensing device 'to its nope'rative position, thereby discontinuingthe flow er adhesive through the nozzle. I

The above and other objects and features'of the in vention will appearinthe follo'wing detailed description of the preferred -embodiment thereofwhich is illustrated'in the a'ccompanying drawings, and will be pointedbutin' the claims.

In the drawings,

Fig l is a 'view in'perspec'tive showing' 'themove l apparatus of thisinvention as applied to a well-"known'type of 'tube fo'rming machine;

':'Fig-. :2 1's a view in side elevation and at 'anenlar'ge'd scal'eof-the-n'ovel apparatus showing members provided for supporting theapparatus on the machine;

-.Fi'g. 3 is a 'view in side elevation of an adhesive' m'elting andfeeding device forming part of the apparatus;

. Fig.- 4iis a view in perspective of a portion of theadhesivemeltingand feeding device;

FigLJ lS a view in vertical'section substantially on line -V-V- 0f Fig.'3 and looking in the direction of the arrows;

"Fig; 6 is' a plan view of 'a portionof' theadhesive melting and feedingdevice;

Fig. 7 is a view in endelevationof that portion of the "adhesive meltingand feedin'g device whichis shown-in Fig. 6;-and

Fig. 8-is a view at anenl'argedscaleand iin'vertical-sectionsubstantially on line VIIIVI II of Fig. '6-atid looking in thedirection of the'ar'row.

Referring to Fig. 1, 'the'inov'el apparatus of the-present inventionistherein illustrated :as associated with a'tub'e forming machine ofwell-known construction'andhaving a machine frame indicated generally bythe "reference character 10 on which :there are supported pressing andfeeding rolls 12,14 driven 'by mechanism not shown but including a powerdriven shaft 16. As is usual in rmachines of this type, the hereinillustrated machine has vario'us guide members indicated by referencecharacters 18, 20, 22 and 24 for causing a Web of pap'erW to be formedinto a tube having overlapped portions'which are pressed together by thepressing'and feeding-rolls in a manner that will be readily understoodby persons skilled in the art of paper bag manufacture. Just before theoverlapped portions of the web reach the-pressing and feeding rolls aband ofuadhesive is applied to the underneatht portion of the web bymeans of a nozzle 'member 30 which is formed asa part of the adhesivemelting: and

applying device of the present invention.

Securedto and extending upwardly from -the frame 10 of the tube formingmachine are two arms-40, 42, 'Figs. ;.1 and 2, and pivotally supportedon the arm 42 by means of a stud 43 is a cro'ssbar44on which anadhesivemelting'and feeding device comprising a body portion Sit-isadjustably'mounted by means 'of'a guideway 52, formed in a cover member54 associated with the aforementioned body'portion, and a clamping screw56 adapted to hold -the body portion in any selectedjpositionof'adju's'tment along the crossbar. =Carried by-a shaft58 and rotatablymounted within a generally circularrecess: 60, formed-"in the bodyportion 50, is a-rnelting and feeding disk 62. Also formed in the body.portion 50 is an inlet passage 64 and an outlet chamber 66. Securedtothe body portion Strand having a passage 70 formed therein -and -inalinement with the-inlet passage 64 is a guideiblock 72,

"and mounted on the body portion is a bracket member 74 on whichissupported feed mechanisminciuding afeed wheel 76 arranged :to be drivenfrom the shaft 58 by mounted on the machine frame. the melting andfeeding device and also of the arm 120 I are regulated so as to controlthe temperature of the 11 molten adhesive, as it is extruded through thenozzle 30, by means of suitable thermostats, not shown.

means of a sprocket 78, chain 80, and sprocket 82, and s presser wheel84 arranged to be held yieldingly against a rod of adhesive R by meansof a compression spring 86, the wheels 76 and 84 extending intoengagement with the adhesive rod through suitable openings 88, 90 formedin a guide bushing 92 also carried by the bracket 74.

Arranged within the outlet chamber 66 are the two gears 94, 96 of a gearpump adapted to pump molten adhesive, delivered by the disk 62 into theright-hand side of the chamber 66, Fig. 3, to the left-hand side of thischamber and thence into a transverse passage 98 formed partly in thebody portion 50 and partly in the cover 54, Fig. 5. On the right-handside of the gears 94,

96, as viewed in Fig. 5, this passage is in communication with adownwardly extending discharge passage 100, while on the left-hand sideof these gears this passage is in communication with a by-pass passage,indicated generally by the reference character 102 and leading back tothe right-hand side of the chamber 66, and two interconnected needlevalves 104, 106 are provided for varying the amounts of molten adhesivewhich are delivered, respectively, into the discharge passage 100 andreturned through the by-pass passage 102.

Mounted on conical bearings 110, 112, supported, respectively, by thebody portion 50 and. a bracket member 114 carried thereby, is a block116 to which there is secured an L-shaped arm indicated generally by thereference character 120. Formed in the arm 120 is a pas- .sageway 122which communicates, at its lower end, with discharge passages 124, 124provided in the nozzle 30, formed integrally with this end of the arm,Fig. 8. At its upper end the passageway 122 is in communication with abore 126, formed in the block 116, which is in alinement with a bore 128formed in the body portion 50 and intersecting the aforementioneddischarge passage 100, Fig. 5. As will be seen in Fig. 8, the dischargepassages 124 of the nozzle open into a recess 130, formed in theoperating face of the nozzle and adapted to apply a band of moltenadhesive B to the lowermost run of the web W when the adhesive applyingapparatus and nozzle 30 are in the operative positions in which theyappear in Fig. 1. Because of the angularly offset arrangement of thelower portion of the arm 120 relatively to the pivotal' axis provided bythe conical bearings 110, 112, see Fig. 6, the nozzle 30 will be held inengagement with the web W by the action of gravity. A handle 132 ismounted on the block 116 so that the operator of the tube formingmachine may lift the nozzle away from the web when desired.

'various portions of the adhesive melting and feeding device and also inthe arm 120 are a number of electrical heating units H, H which areconnected to a source of electrical energy through a switch and controlbox B also The temperatures of For driving the shaft 58 to rotate themelting and feeding disk 62, to drive the pump gears 94, 96 throughsuit- ,able drive gears-150, 152, Fig. 3, and to drive the feed :whcel76, through chain 80, ajaw clutch comprising two elements 154, 156 isprovided. The element 154 is fast on the right-hand end of the shaft 58,Fig. 2, while the element 156 is fast on one end of a spline shaft 158.The

other end of the shaft 158 is slidably supported on match- ,ing splinesformed in the left-hand end of a hollow drive shaft-160 which isrotatably mounted in suitable bearings .formed in upstanding portions162, 164, of the crossbar .A coil spring 166 within the hollow shaft 160tends to urge the jaw clutch member 156 yieldingly into engagement withthe jaw clutch member 154 thus to connect the shaft 58 to the shafts 158and 160. The shaft is driven continuously, during the operation of thetube forming machine, from the aforementioned driven shaft 16, by meansof sprockets 170, 172 and a chain 174, Fig. 1.

For moving the clutch member 156 to the right as viewed in Fig. 1,against the action of the spring 166, thereby to discontinue the driveto the shaft 58 and stop the flow of adhesive through the nozzle 30, aclutch shifting arm is pivotally mounted on the bar 44 by means of astud 182, and this arm, which has an operating handle 184, is connectedto the clutch member 156 by means of a clutch yoke 186, Fig. 2.

As explained above, the crossbar 44 is pivotally supported at one end onthe upstanding arm 42 by means of a stud 43. The other end of thecrossbar is supported on the other upstanding arm 40, see Fig. 2, and inorder to hold the crossbar 44 and the adhesive melting and feedingapparatus in the operative positions shown, against the action of acounterweight suspended from an extending end portion 192 of thecrossbar by means of a link 194, a manually releasable latch member,indicated generally by the reference character 196, is provided. Thislatch member is pivotally mounted on the left-hand end of the crossbar44 on a pin 198 and has a hooked portion 200 which is adapted to be heldin latching relation to an offset shoulder portion 202 on the arm 40 bymeans of a compression spring 204, interposed between an operating arm206 of the latch member and the bar 44. As will be apparent, theoperator, merely by striking the arm 206, can easily release the latchand free the bar 44, together with parts carried thereby, for elevationto the inoperative position indicated in broken lines in Fig. l of thedrawings, by the action of the counterweight 190 and as determined bythe engagement of the extending portion 192 with an abutment surface 208on the arm 42.

When the crossbar 44, together with the adhesive melting and feedingapparatus carried thereby, are thus elevated to inoperative position,the shaft 58 is automatically disconnected from the shaft 160 in thefollowing manner. Connected to the arm 180 is one end of a rod 210 theother end of which is slidably received within a hollow sleeve-likemember 212 which is pivotally connected to a laterally extending portion214 of the arm 42, Fig. 2, by means of a pin 216. The rod 210 carries apin 218 which is held in engagement with the left-hand end of a slot220, formed in the member 212, by means of a compression spring 222,when the parts are in the position shown in Fig. 2. As will be apparent,due to the offset relation of the stud 43 and pin 216, when the bar 44is swung upwardly, as above explained, the rod 210 and the sleeve-likemember 212 act as a rigid link which swings the arm 180 in a clockwisedirection thereby shifting the clutch member 156 to the right anddisconnecting the shaft 58 from the shafts 158 and 160. When the bar 44is in the latched-down position in which it is shown in Fig. 2, the arm180 may also be swung in a clockwise direction by the operator againstthe resistance of the spring 222 and by means of the handle 184. Forholding the arm in a position to disconnect the shaft 58 from the shaft158, a latch member 230, mounted on the rod 210, is adapted to engage anotch 232 formed in the sleeve-like member 212.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. Apparatus for applying adhesive to the marginal portion of atraveling web in a machine having a frame, web feeding instrumentalitiesand power operating means, said apparatus comprising a device fordispensing adhesive including an adhesive applying nozzle and means forextruding adhesive through the nozzle, and a clutch for operativelyconnecting said extruding means to the 7 power operating means of themachine, a member for supporting said device extending transversely ofthe machine, above the traveling web, and pivotally mounted at oneendson a support associated with the frame of the machine, a secondsupport associated with the frame of the machine for receiving the otherend of the supporting member to locate the adhesive dispensing deviceinoperative position, means tending to effect pivotal movement of thesupporting member in a direction to displace the adhesive dispensingdevice from its operative position to an inoperative position in whichsaid device is swung upwardly and away from the traveling web, means forreleasably securing said other end of the supporting member to saidsecond support, and means for automatically disengaging said clutch inresponse to pivotal movement of the supporting member to displace theadhesive dispensing device to inoperative position.

2. Apparatus for applying adhesive to the marginal portion of atraveling web in a machine having a frame, web feeding instrumentalitiesand power operating means, said apparatus comprising a device fordispensing adhesive including an adhesive applying nozzle and means forextruding adhesive through the nozzle, and a clutch for operativelyconnecting said extruding means to the power operating means of themachine, a member for supporting said device extending transversely ofthe machine above the traveling web and pivotally mounted at one end ona support associated with the frame of the machine, a second supportassociated with the frame of the machine for receiving the other end ofthe supporting member to locate the adhesive dispensing device inoperative position, means tending to eifect pivotal movement of thesupporting member in a direction to displace the adhesive dispensingdevice from its operative position to an inoperative position in whichsaid device is swung upwardly and away from the traveling web, amanually operable latch for releasably securing said other end of thesupporting member to said second support, and means for automaticallydisengaging said clutch in response to pivotal movement of thesupporting member to displace the adhesive dispensing device toinoperative position.

3. Apparatus for applying adhesive to the marginal portion of atraveling web in a machine having a frame, web feeding instrumentalitiesand power operating means, said apparatus comprising a device fordispensing adhesive including an adhesive applying nozzle and means forextruding adhesive through the nozzle, and a clutch for operativelyconnecting said extruding means to the power operating means of themachine, a member for supporting said device extending transversely ofthe machine above the traveling web and pivotally mounted at one end ona support associated with the frame of the machine, a second supportassociated with the frame of the machine for receiving the other end ofthe support ing member to locate the adhesive dispensing device inoperative position, a counterweight connected to said supporting membertending to effect pivotal movement of the supporting member in adirection to displace the adhesive dispensing device from its operativeposition to an inoperative position in which said device is swungupwardly and away from the travelng web, means for releasably securingsaid other end of the supporting member to said second support, andmeans for auto matically disengaging said clutch in response to pivotalmovement of the supporting member to displace the adhesive dispensingdevice to inoperative position.

4. Apparatus for applying adhesive to the marginal portion of atraveling web in a machine having a frame, web feeding instrumentalitiesand power operating means, said apparatus comprising a device fordispensing adhesive including an adhesive applying nozzle and means forextruding adhesive through the nozzle, and a clutch for operativelyconnecting said extruding means to the power operating means of themachine, a member for supporting said device extending transversely ofthe machine above the traveling web and pivotally mounted at one end ona support associated with the frame of the machine, a second supportassociated with the frame of the machine for receiving the other end ofthe supporting member to locate the adhesive dispensing device inoperative position, a counterweight connected to said supporting membertending to effect pivotal movement of the supporting member in adirection to displace the adhesive dispensing device from its operativeposition to an inoperative position in which said device is swungupwardly and away from the traveling web a manually operable latch forreleasably securing said other end of the supporting member to saidsecond support, and means for automatically disengaging said clutch inresponse to pivotal movement of the supporting member to displace theadhesive dispensing device to inoperative position.

References Cited in the file of this patent UNITED STATES PATENTS

